I have a pooled cross-section dataset of 788 firms for the period of 2006-2017. There was an exogenous shock in 2009 to all my set of firms due to which some became treated and some remained untreated in the post-period. To find out the counterfactual sample in the pre-period for the treated group in the post-period, I have used propensity score matching methods. Thereafter, I have employed a difference-in-difference methodology to find the impact of the treatment on the outcome.
Now, my objective is to show graphically the differential impact of the treatment on the outcome for the treated and control group in the pre-post period
I am also attaching a graph from the paper I am following. I want to make a similar graph to show graphically the differential impact of the treatment in my study.
Please help me on how to do it with Stata?